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P. s'. STRONG.

SAND PAPER ROLL.

Patented Sept. 8, 1885.

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n. PETERS. Plmta-Lilhogmphen UNITED STATES PATENT Orrios.

FREDERICK S. STRONG, OF EAST BRIDGEWATER, MASSACHUSETTS, ASSIGNOR TO THE CARVER COTTON GIN COMPANY, OF SAME PLACE.

SAND-PAPER ROLL.

SPECIFICATION forming part of Letters Patent No. 325,708, dated September 8, 1885.

Application filed June 23, 1884.

To all whom, it may concern:

Be itk nown that I, FREDERICK S. STRONG, of East Bridgewater, in the county of Plymouth and State of Massachusetts, have invented a new and useful Improvement in Sand-Paper Rolls, of which the following, taken in con nection with the accompanying drawings, is a specification.

The object of myinvention is to adapt to the paper-holding roll a headed drag-pin, which, passing through the overlapped ends of the sandpaper, connects them together. This drag-pin, penetrating through the shell of the roller into the interior, is provided with 1 shoulders, with which grasping-jaws engage, these grasping-jaws being connected respectively to the ends of a yoke-spring, said spring being actuated by an eccentric which can be turned by a key from the outside. I attain this object by the mechanism illustrated in the accompanying drawings, in which- Figure 1 is a section through the center at right angles to the axis, showing my device as it appears when ready for use. Fig. 2 is a 2 similar section of the same, showing the paper overlapped and the dragging-pin pushed through ready to be grasped by the jaws, which serve to draw it firmly into the place indicated in Fig. 1. Fig. 3 is a vertical sec- 0 tion taken on the line of the axis.

In the drawings a metallic case, A C D, is represented, the part A having a hub, B, at tachcd to it, D being a ring-disk fastened to the part A by means of screw-bolts located at E E E E, Figs. 1 and 2. This case A C D is covered with a suitable thickness of felt or some such yielding material, C. The sandpaper P is placed around the outside, the ends overlapping, as shown at 1). Through these overlapping ends I push the drag-pin H. The dragpin H is provided with a head which has sufficient under surface to firmly hold the sandpaper. The pin II is pointed, as shown at b, so that it may readily penetrate the pa- 5 per, and is provided with shoulders L L, Figs.

1 and 2.

(N0 model.)

S, Figs. 1 and 2, is a yoke-spring having jaws S S attached to its ends, these jaws be ing so formed, as shown in Figs. 1 and 2, that when they are drawn down between the fixed 5o buttresses K K theywill approach each other and grasp the pin H and drag it down with them to the position shown in Fig. 1. Motion is imparted to the yoke-spring S and the jaws L L by means of the crank-disk N. This crank-disk N has a crank-pin, N, which passes through a projection, S, on the spring S, so that when the crank-disk N is turned the spring S and its parts will move up or down, as the case may be. A, Figs. 1 and 2, is a cc buttress attached to the case A, and serves to limit the motion of the eccentric N so that it can only be turned slightly past its centerthat is, enough to hold it from turning back. This eccentric N is provided with a square socket, as shown at N, Fig. 3, for the purpose of receiving a key for operating it. This yoke spring S is very much extended at its lower end, so as to form almost a circle, as indicated in Figs. 1 and 2. This shape of the spring allows it as a whole to elongate itself when subjected to great strain, so it will an comniodate itself to a great extent to different thicknesses of felting.

I claim as my invention In a sand-paper roll, the combination of the casing A C D, the buttresses K K, and step A with the crank-disk N, spring S, having jaws S S and the drag-pin H, whereby a yielding tensile strain is brought to bear on the covering of the wheel, all substantially as described, and for the purpose set forth.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, on this 20th day of June, 85 A. D. 1884.

FREDERICK S. STRONG.

WVitnesses:

FRANK G. PARKER, CHAS. SPAULDING. 

